<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>id 选择器</title>
    <style>
        #first{
           color: red; 
        }
    </style>
</head>
<body>
    <div class="wrapper" id="first">
        111
        <input type="text" name="wd" id="wd" >
        <input type="submit" value="百度一下" id="button-baidu" >
    </div>
    
    <div class="wrapper" id="first">
        222
        <input type="text" name="q" id="q" >
        <input type="submit" value="360搜索" id="button-360" >
    </div>

    
</body>
</html>